Yes, used the INON lens for the shark. I find it to be a sharp lens and didn't experience the dreaded lens flare, except in some of the videos I did of the sea lions. Not sure if the WA lens was the cause of the flare or if it was the movie mode when I panned by the sun. Only other strange thing I noticed was that if I had the camera at maximum zoom with the wide angle lens on (not recommended in any case (always shoot it as a fixed focus lens with the digicam at maximum WA for best results) but I mention it because I goofed up a couple times and found this out) I would always get overexposure from the DS-125. The UWL-100 also is good for shots of the divers on the panga on the way back to the "mother ship" as it will give you a nice fisheye shot when above water ( http://members.cox.net/moelrich/images/Divers_640.jpg ). I tried to get some over-unders of sea lions with it but found it nearly impossible to synchronize the proper water level with the shutter lag while bobbing around in the water. One last thing. You must make sure the space between the lens and the housing fills completely with water. There are two ways to do this, neither of which is fun in strong currents, especially while wearing gloves. The first way is to carry the lens down separately, then attach it after submerging (being careful to "whoosh" away the little bubbles, which always stick to the port). the second is to attach the lens while topside, then take it off, "whoosh", and reattach after submerging. If you don't remove and reattach it, there *will* be air bubbles in there. I went with the second method because we were doing back roll entries off of RIBs with no air in our BCs; basically, we dropped in like rocks in order to get down to the rocks quickly. This meant unscrewing the lens, holding it while "whooshing", then reattaching it, all while descending or once "safely" wedged in between barnacles. I dropped the lens once while next to a wall and about lost my mind in the split second it took me to catch it.
I have two DS-125s but only used one at a time. Exposure from them was a bit erratic, partly from their known (but fixable) deficiencies and partly because I'm still learning how to use them. For the wide angle shots, I used Program mode (but with ASA forced to 100), for the most part, though I wish I'd gone to manual for the CFWA ones. I pared down my setup and shooting style due to the combination of strong currents and my still weak right knee, which is recovering slowly from reconstructive surgery. One strobe was plenty to worry about while hanging on to the barnacles in strong surge and current, and if I had used both hands to mess around with camera exposure settings I would have been pushed around by the surge or blown off the wall. Next time I go to the Caribbean, I'll be able to go whole hog again.
A final recommendation: Wear Kevlar gloves to the Galapagos. I found it impossible to avoid the barnacles while holding onto a camera. Check out this comparison between my Kevlar SeaSoft gloves and someone else's leather reef gloves ( http://members.cox.net/moelrich/images/Ouch.jpg ). The owner of the reef gloves was shooting video for several days with his gloves and it didn't take long for them to look like this (ouch!). The gloves I used are made by Watermark and are made especially for divers who want some dexterity but need to wear gloves. They are mostly 3mm, but the thumb and forefinger are 1.5mm. I found them very comfortable and I was, indeed, able to operate all the camera buttons with them, though I found it nearly impossible to grip and remove push-on lens covers with them once in the water. They also make a 5mm/3mm version for even colder water. The bad news: price. I paid $69 for them (plus $8 shipping and handling) and had to special order them from the manufacturer because they wouldn't let my local dealer (who is an authorized dealer but doesn't normally stock their gloves) order less than 6 pairs at a time -- they instructed the dealer to have me call them directly to order . . . http://www.watermark1.com if you're interested.
